You need to have Paint.net and put the banner onto the banners file found in the textures folder of native or a mod then replace a banner from the game with one of the seleced.
I put a .txt file in the mod for you to read that contains the instructions
Conrad_the_Sellsword
Matthew joined
I love learning about history such as WW1, WW2 and the Middle Ages, I like watching movies and playing games about war. These include Ravenfield, Mount and Blade: Warband, Medieval Total War, Empire Total War and Napoleon Total War. I am known on the /r/Mount&Blade; Discord Server as Sir Conrad the Sellsword.